JP2021075088A - Vehicle frame structure - Google Patents

Abstract

To provide a vehicle frame structure that can secure a space in a vehicle cabin and improve collision safety performance.SOLUTION: A vehicle frame structure includes: a front back wall portion 14 disposed at at least one of a front end portion and a back end portion of a vehicle 10 and extending in a vehicle width direction and a vehicle up-down direction to define inner and outer sides of a vehicle cabin; a side wall portion 16 extending from a vehicle width end portion of the front back wall portion 14 in the vehicle front-back direction to define the inner and outer sides of the vehicle cabin; and a connection portion 70 in a closed cross sectional structure having one end portion connected to an inner side in the vehicle front-back direction of the front back wall portion 14 and the other end portion connected to an inner side in the vehicle width direction of the side wall portion 16 and bent in a recessed shape toward the inner side in the vehicle width direction and the inner side in the vehicle front-back direction in a plan view.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle skeleton structure.

Patent Document 1 discloses a vehicle front structure of a small bus including a front panel serving as a front wall portion of the vehicle and a side panel serving as a side wall portion of the vehicle. In this vehicle front structure, a flange is formed on the front pillar, and the front panel and the side panel are connected via the flange to improve the assembling workability.

Japanese Unexamined Patent Publication No. 11-105748

Like the vehicle front structure described in Patent Document 1, the vehicle skeleton structure of the vehicle provided with the front panel and the side panel can secure a wide space in the vehicle interior. On the other hand, a structure that suppresses the front panel and the side panel from entering the vehicle interior in the event of a collision is required, and there is room for improvement from the viewpoint of improving the collision safety performance.

In consideration of the above facts, an object of the present invention is to obtain a vehicle skeleton structure capable of improving collision safety performance while securing a space in the vehicle interior.

The vehicle skeleton structure according to claim 1 is provided at at least one of a front end portion and a rear end portion of the vehicle, and extends in the vehicle width direction and the vehicle vertical direction to separate the front and rear wall portions from the inside of the vehicle and the outside of the vehicle. A side wall portion extending in the vehicle front-rear direction from the end portion of the front-rear wall portion in the vehicle front-rear direction and partitioning the vehicle interior and the vehicle interior exterior, and one end portion are connected to the inside of the vehicle front-rear direction of the front-rear wall portion. The other end portion is connected to the inside of the side wall portion in the vehicle width direction, and has a connecting portion having a closed cross-sectional structure curved so as to be convex inside the vehicle width direction and inside the vehicle front-rear direction in a plan view.

In the vehicle skeleton structure according to claim 1, front and rear wall portions are provided at at least one of the front end portion and the rear end portion of the vehicle, and the front and rear wall portions extend in the vehicle width direction and the vehicle vertical direction. It separates the inside of the vehicle from the outside of the vehicle. Further, a side wall portion extends from the end portion of the front and rear wall portions in the vehicle width direction in the vehicle front-rear direction, and the side wall portion separates the inside of the vehicle and the outside of the vehicle. By partitioning the interior of the vehicle and the outside of the vehicle interior by the front and rear wall portions and the side wall portions in this way, a wide space inside the vehicle interior can be secured.

Further, one end of the connecting portion is connected to the inside of the front and rear wall portions in the vehicle front-rear direction, and the other end of the connecting portion is connected to the inside of the side wall portion in the vehicle width direction. In this way, the front and rear wall portions and the side wall portions are connected by the connecting portion. Here, the connecting portion is curved so as to be convex inward in the vehicle width direction and inward in the vehicle front-rear direction in a plan view. As a result, when the vehicle collides, the collision load is suppressed from being locally concentrated on the connecting portion, and the collision load can be mutually transmitted between the front and rear wall portions and the side wall portion via the connecting portion. , It is possible to prevent the front and rear wall portions and the side wall portions from entering the vehicle interior. The term "curved" as used herein is not limited to a completely curved structure, but is a concept that broadly includes a shape in which linear portions are connected and curved as a whole.

In the vehicle skeleton structure according to claim 2, in claim 1, the front and rear wall portions are provided with front and rear reinforcing portions having a closed cross-sectional structure extending in the vehicle width direction, and the side wall portions are provided with front and rear reinforcing portions. A side reinforcing portion having a closed cross-sectional structure extending in the front-rear direction of the vehicle is provided, and one end of the connecting portion is connected to the front-rear reinforcing portion and the other end is connected to the side reinforcing portion. ing.

In the vehicle skeleton structure according to claim 2, one end of the connecting portion is connected to the front and rear reinforcing portions of the closed cross-section structure, and the other end of the connecting portion is connected to the side reinforcing portion of the closed cross section structure. .. As a result, the collision load can be smoothly transmitted between the reinforcing portions of the closed cross-section structure.

The vehicle skeleton structure according to claim 3, wherein the connecting portion is arranged at the front portion of the vehicle, and the front / rear wall portion and the side wall portion provided at the front end portion of the vehicle are provided in the first or second aspect. And are connected.

In the vehicle skeleton structure according to claim 3, deformation of the front part of the vehicle can be suppressed particularly at the time of a frontal collision by connecting the front and rear wall portions and the side wall portions provided at the front end portion of the vehicle by the connecting portion. it can.

In claim 3, the vehicle skeleton structure according to claim 4 is provided with a pair of connecting portions on both sides in the vehicle width direction with a vehicle seat interposed therebetween.

In the vehicle skeleton structure according to claim 4, even when the vehicle seat is arranged in the front part of the vehicle, it is possible to prevent the front and rear wall portions and the side wall portions from entering the vehicle interior at the time of a collision. It is possible to protect the occupant seated on the vehicle seat.

In the vehicle skeleton structure according to claim 5, in any one of claims 1 to 4, functional parts of the vehicle are housed in a region surrounded by the front and rear wall portions, the side wall portions, and the connecting portion. Has been done.

In the vehicle skeleton structure according to claim 5, the functional parts can be collectively accommodated by accommodating the functional parts in the area surrounded by the front and rear wall portions, the side wall portions, and the connecting portion. As a result, it is possible to suppress the narrowing of the internal space of the vehicle interior as compared with the configuration in which the functional parts are dispersedly arranged.

As described above, according to the vehicle skeleton structure according to the present invention, it is possible to improve the collision safety performance while securing the space in the vehicle interior.

It is a side view which shows the main part of the vehicle to which the vehicle skeleton structure which concerns on embodiment is applied. It is a perspective view which looked at the front part of the vehicle interior in an embodiment from the diagonally left rear view. It is a top view of the main part of the vehicle interior in the embodiment. It is a model diagram which shows the deformed state of the front part of a vehicle when the collision load is input to the vehicle to which the vehicle skeleton structure which concerns on embodiment is applied. It is a model diagram which shows the deformation state of the front part of a vehicle when a collision load is input to the vehicle of a comparative example.

The vehicle skeleton structure according to the embodiment will be described with reference to the drawings. The arrows FR, UP, and RH, which are appropriately described in each figure, indicate the front direction, the upward direction, and the right direction of the vehicle, respectively. Hereinafter, when the explanation is simply made using the front-rear, up-down, and left-right directions, unless otherwise specified, the front-rear direction of the vehicle front-rear direction, the up-down direction of the vehicle up-down direction, and the left-right direction when facing the vehicle front direction shall be indicated. ..

As shown in FIG. 1, the vehicle 10 to which the vehicle skeleton structure according to the present embodiment is applied is, for example, an electric vehicle used as a commercial vehicle, and can switch between automatic driving and manual driving. .. Further, the vehicle 10 has a substantially rectangular parallelepiped shape surrounded by the roof 12, the front wall portion 14 as the front and rear wall portions, the side wall portion 16, and the rear wall portion 18 as the front and rear wall portions, and is formed in the front portion of the side wall portion 16. Is provided with an entrance 16A. Further, a front wheel 20 is provided at the front portion of the vehicle 10, and a rear wheel 22 is provided at the rear portion of the vehicle 10.

Here, the floor panel 24 of the vehicle 10 of the present embodiment is formed so that the front portion is higher than the rear portion. Specifically, in the vehicle interior of the vehicle 10, a step portion 24A is provided slightly behind the front wheel 20, and the front floor panel 24B on the front side of the step portion 24A is more than the step portion 24A. It is formed one step higher than the center floor panel 24C on the rear side.

The front floor panel 24B is provided with a vehicle seat 26 on which the driver can sit. The vehicle seat 26 is located at the center in the vehicle width direction, and a steering wheel 28 is provided on the vehicle front side of the vehicle seat 26. Further, the center floor panel 24C is provided with a plurality of vehicle seats (not shown).

As shown in FIG. 2, the front wall portion 14 is provided at the front end portion of the vehicle 10, and includes a front panel 29, a front apparition information 32, and a front lower reinforcement 36. The front panel 29 extends in the vehicle width direction and the vehicle vertical direction with the vehicle front-rear direction as the plate thickness direction, and the vehicle interior and the vehicle interior exterior are separated by the front panel 29. Further, the right end portion of the front panel 29 is joined to the lower end portion of the front pillar 46, and the upper end portion of the front panel 29 is bent toward the front side of the vehicle and joined to the cowl panel 30.

A front apparition infoment 32 is provided on the inner surface of the vehicle (rear side of the vehicle) at the upper end of the front panel 29. The front apparition information 32 extends in the vehicle width direction and is formed in a substantially hat-like cross section open to the front side of the vehicle. Further, the upper and lower flange portions of the front apparition information 32 are joined in a state of being overlapped with the front panel 29. The front panel 29 and the front apparition infoment 32 form a front-rear reinforcing portion 34 having a closed cross-sectional structure.

A front lower reinforcement 36 is provided on the inner surface (rear side of the vehicle) of the lower part of the front panel 29. The front lower reinforcement 36 extends in the vehicle width direction, and is formed in a substantially hat-like cross section open to the front side of the vehicle. Further, the upper and lower flange portions of the front lower reinforcement 36 are joined in a state of being overlapped with the front panel 29. The front panel 29 and the front lower reinforcement 36 form a lower reinforcing portion 38 having a closed cross-sectional structure.

The side wall portion 16 extends from the right end portion (end portion in the vehicle width direction) of the front wall portion 14 to the rear side of the vehicle. The side wall portions 16 are provided on both side portions of the vehicle 10, and include a side panel 40 and a side apparition information 42.

The side panel 40 extends in the vehicle front-rear direction and the vehicle vertical direction with the vehicle width direction as the plate thickness direction, and the vehicle interior and the vehicle interior exterior are separated by the side panel 40. Further, the front end portion of the side panel 40 is joined to the lower end portion of the front pillar 46, and the rear end portion of the side panel 40 is connected to the center pillar 51.

A side apparition information 42 is provided on the inner surface of the vehicle (inside in the vehicle width direction) at the upper end of the side panel 40. The side apparition information 42 extends in the front-rear direction of the vehicle, and is formed in a substantially hat-like cross section open to the outside in the vehicle width direction. Further, the upper and lower flange portions of the side apparition information 42 are joined in a state of being overlapped with the side panel 40. The side panel 40 and the side apparity information 42 form a side reinforcing portion 44 having a closed cross-sectional structure.

The front pillar 46 connects the first pillar portion 48 arranged on the front side of the vehicle, the second pillar portion 50 arranged on the rear side of the vehicle, and the lower ends of the first pillar portion 48 and the second pillar portion 50. It is configured to include a lower connecting portion 52 to be formed. The right end of the front panel 29 is connected to the first pillar 48 of the front pillar 46, and the front end of the side panel 40 is connected to the second pillar 50 of the front pillar 46. Therefore, the front panel 29 and the side panel 40 are connected via the front pillar 46. Although not shown, the left side of the vehicle has the same structure. That is, the left end portion of the front panel 29 and the left side panel 40 are connected via the left front pillar.

Here, the functional component accommodating portion 60 is provided at the front end portion and the right end portion in the vehicle interior. The functional component accommodating portion 60 includes a dash panel 62, an upper cover member 64, a curved reinforcement 66, and a standing wall reinforcing member 68. Further, although not shown, a similar functional component accommodating portion is provided at the front end portion and the left end portion in the vehicle interior. Therefore, a pair of functional component accommodating portions are provided on both sides of the vehicle seat 26 in the vehicle width direction. In the following description, only the functional component accommodating portion 60 on the right side will be described, and the illustration and description of the functional component accommodating unit on the left side will be omitted.

The dash panel 62 extends in the vertical direction of the vehicle, and has a substantially arcuate curved surface 62A that is convex in the vehicle width direction and inward in the vehicle rear side (inside in the vehicle front-rear direction) in a plan view. The inside of the vehicle and the outside of the vehicle are separated by the surface 62A. Further, a lower flange 62B bent along the front floor panel 24B is formed at the lower end of the dash panel 62, and the lower flange 62B is joined in a state of being overlapped with the front floor panel 24B.

A right flange 62C bent along the side panel 40 is formed at the right end of the dash panel 62, and the right flange 62C is joined in a state of being overlapped with the side panel 40. Further, a left flange 62D bent along the front panel 29 is formed at the left end portion of the dash panel 62, and the left flange 62D is joined in a state of being overlapped with the front panel 29.

Further, an upper flange 62E bent to the outside of the vehicle interior is formed at the upper end of the dash panel 62. An upper cover member 64 is mounted on the upper flange 62E, and the upper cover member 64 closes the upper side of the functional component accommodating portion 60.

Here, a curved relief 66 is provided at the upper end of the dash panel 62. The curved reinforcement 66 is provided on the outer surface of the vehicle interior of the curved surface 62A, and is curved along the curved surface 62A of the dash panel 62 to form a substantially L-shaped cross section. A lower flange 66A bent downward along the curved surface 62A of the dash panel 62 is formed at the lower end of the curved relief 66, and the lower flange 66A is overlapped with the curved surface 62A. It is joined. Further, an upper flange 66B bent along the upper flange 62E of the dash panel 62 is formed at the upper end of the curved relief 66, and the upper flange 66B is overlapped with the lower surface of the upper flange 62E of the dash panel 62. It is joined in the state of being joined. In this way, the dash panel 62 and the curved relief 66 form a connecting portion 70 having a closed cross-section structure.

Like the dash panel 62, the connecting portion 70 is curved in a substantially arc shape so as to be convex inward in the vehicle width direction and inward in the vehicle rear side (inside in the vehicle front-rear direction) in a plan view. Further, one end of the connecting portion 70 is joined to the front apparity infoment 32 of the front wall portion 14, and the other end of the connecting portion 70 is joined to the side apparition information 42 of the side wall portion 16. Therefore, the front wall portion 14 and the side wall portion 16 are connected by the connecting portion 70. Then, as shown in FIG. 3, a region S surrounded by the front wall portion 14, the side wall portion 16, and the connecting portion 70 is formed in a plan view, and the functional component 11 of the vehicle 10 (FIG. 3) is formed in this region S. 1) is arranged. The functional components 11 arranged in the area S include, for example, a headlamp unit, a washer tank, and sensors.

As shown in FIG. 2, the dash panel 62 is provided with a vertical wall reinforcing member 68. The vertical wall reinforcing member 68 is provided on the outer side of the vehicle interior on the curved surface 62A of the dash panel 62 and extends in the vertical direction, and includes a pair of front and rear flange portions 68A joined in a state of being overlapped with the curved surface 62A. ing. Further, the standing wall reinforcing member 68 projects from the flange portion 68A to the right side of the vehicle, and is formed in a substantially hat-like cross section in which the left side of the vehicle is open when viewed from above the vehicle. The lower end of the standing wall reinforcing member 68 is joined to the front floor panel 24B, and the upper end of the standing wall reinforcing member 68 is joined to the curved reinforcement 66. In the present embodiment, the length of the vertical wall reinforcing member 68 in the vehicle width direction becomes shorter from the lower side to the upper side. Therefore, the standing wall reinforcing member 68 has a substantially triangular shape when viewed from the front-rear direction of the vehicle.

As shown in FIG. 3, a floor reinforcement 72 is provided on the lower surface of the floor panel 24. The floor reinforcement 72 extends in the front-rear direction of the vehicle and is continuously provided on the front floor panel 24B and the center floor panel 24C. The vertical wall reinforcing member 68 constituting the functional component accommodating portion 60 is located above the floor reinforcement 72. That is, the vertical wall reinforcing member 68 is connected to the floor reinforcement 72 via the front floor panel 24B.

(Action)
Next, the operation of this embodiment will be described.

In the vehicle skeleton structure of the present embodiment, as shown in FIG. 2, the dash panel 62 and the curved reinforcement 66 form a connecting portion 70 having a closed cross-section structure, and one end of the connecting portion 70 is a front wall. It is connected to the inside of the unit 14 in the front-rear direction of the vehicle. Further, since the other end of the connecting portion 70 is connected to the inside of the side wall portion 16 in the vehicle width direction, the front wall portion 14 and the side wall portion 16 are connected by the connecting portion 70. As a result, when the vehicle collides, the collision load is suppressed from being locally concentrated on the connecting portion 70, and the collision load is mutually transmitted between the front wall portion 14 and the side wall portion 16 via the connecting portion 70. It is possible to prevent the front wall portion 14 and the side wall portion 16 from invading the vehicle interior. As a result, the collision safety performance can be improved.

The above operation will be described with reference to the drawings while comparing with a comparative example. FIG. 4 is a model diagram showing only the main parts of the vehicle 10 to which the vehicle skeleton structure according to the present embodiment is applied. Further, in FIG. 4, the state before the collision load is input is shown by the alternate long and short dash line.

As shown in FIG. 4, when the collision load F is input to the vehicle 10 from the front side of the vehicle, the side wall portion 16 is transmitted from the front apparition infoment 32 (front and rear reinforcing portion 34) of the front wall portion 14 via the connecting portion 70. The collision load is transmitted to the side apparity information 42 (side reinforcing portion 44) of the above. In this way, the collision load is smoothly transmitted between the front-rear reinforcing portion 34 and the side reinforcing portion 44 of the closed cross-section structure, so that the deformation of the front portion of the vehicle can be suppressed.

Further, in the present embodiment, the curved reinforcement 66 (connecting portion 70) and the floor reinforcement 72 are connected via the vertical wall reinforcing member 68. As a result, a part of the collision load input from the front apparity infoment 32 to the connecting portion 70 is transmitted to the floor reinforcement 72 via the vertical wall reinforcing member 68. In this way, the collision load can be dispersed, and the deformation of the front part of the vehicle can be further suppressed.

At the time of a side collision of the vehicle 10, the collision load is transmitted from the side apparity infoment 42 to the front apparition infoning 32 and the floor reinforcement 72 via the connecting portion 70 to suppress the deformation of the front part of the vehicle. be able to.

On the other hand, FIG. 5 shows a vehicle 100 of a comparative example. The vehicle 100 is not provided with the functional component accommodating portion 60. Therefore, the structure is not provided with the connecting portion 70 and the standing wall reinforcing member 68. Other configurations are the same as those of the vehicle 10 of the embodiment.

As shown in FIG. 5, when the collision load F is input to the vehicle 100 from the front side of the vehicle, a force acting toward the rear side of the vehicle acts on the front apparition infoment 32 of the front wall portion 14. Here, since the vehicle 100 of the comparative example does not have a connecting portion for connecting the floor reinforcement 72 and the side apparity information 42, the floor reinforcement 72 and the side apparity information 42 are retracted, and the front part of the vehicle Is greatly deformed toward the passenger compartment.

As described above, the vehicle 10 of the present embodiment provided with the connecting portion 70 can suppress the deformation of the front portion of the vehicle as compared with the vehicle 100 of the comparative example not provided with the connecting portion 70.

Further, in the present embodiment, since a pair of functional component accommodating portions are provided on both sides in the vehicle width direction with the vehicle seat 26 interposed therebetween, a pair of connecting portions 70 are provided in the vehicle width direction with the vehicle seat 26 interposed therebetween. Has been done. As a result, even when the vehicle seat 26 is arranged in the front part of the vehicle, it is possible to prevent the front wall portion 14 and the side wall portion 16 from invading the vehicle interior at the time of a collision, and the vehicle seat 26 It can protect the seated occupants. In other words, the driver's seat can be arranged in front of the vehicle while ensuring the collision safety performance of the vehicle.

Further, in the present embodiment, by accommodating the functional component 11 in the area S surrounded by the front wall portion 14, the side wall portion 16, and the connecting portion 70, a plurality of functional components can be accommodated together. As a result, it is possible to suppress the narrowing of the internal space of the vehicle interior as compared with the configuration in which the functional parts 11 are dispersedly arranged. Further, since the connecting portion 70 can suppress the space in the region S from being crushed when the vehicle collides, it is possible to prevent the functional component 11 from being damaged.

Although the embodiments have been described above, it is needless to say that the embodiments can be implemented in various modes without departing from the gist of the present invention. For example, in the above embodiment, the functional component accommodating portion 60 is provided in the front portion of the vehicle 10, and the front wall portion 14 and the side wall portion 16 are connected by the connecting portion 70 constituting the functional component accommodating portion 60. Not limited. A similar functional component housing unit may be provided at the rear of the vehicle. Then, if the rear wall portion 18 and the side wall portion are connected by the connecting portion constituting the functional component accommodating portion, the deformation of the rear portion of the vehicle at the time of the rear collision of the vehicle 10 can be suppressed.

Further, in the above embodiment, the upper portion of the dash panel 62 and the curved reinforcement 66 form a connecting portion 70 having a closed cross-section structure, but the present invention is not limited to this. For example, the same effect can be obtained by providing a substantially tubular reinforcing member on the dash panel 62 and connecting the front wall portion 14 and the side wall portion 16 by the reinforcing member. In this case, the substantially tubular reinforcing member corresponds to the "connecting portion" of the present invention.

Further, in the above embodiment, the vehicle seat 26 in which the driver can sit is provided in the front part of the vehicle, but the present invention is not limited to this, and the driver's seat may not be provided. In this case, the vehicle is only automatically driven, and the vehicle seat 26 may be a seat that can be seated by a general occupant.

Furthermore, in the above embodiment, a pair of left and right functional component accommodating portions are provided with the vehicle seat 26 interposed therebetween, but the present invention is not limited to this, and the functional component accommodating portion may be provided only on one side in the vehicle width direction. Good. For example, as shown in FIG. 2, the functional component accommodating portion 60 may be provided on the right side of the vehicle, and the functional component accommodating portion may not be provided on the left side of the vehicle. In this case, a reinforcing member having a closed cross-section structure having the same function as the connecting portion 70 may be provided on the left side of the vehicle, and the front wall portion 14 and the side wall portion 16 may be connected by this reinforcing member.

10 Vehicle 11 Functional parts 14 Front wall (front and rear walls)
16 Side wall 18 Rear wall (front and rear wall)
26 Vehicle seat 34 Front and rear reinforcement 44 Side reinforcement 70 Connection S area

Claims (5)

Front and rear wall portions provided at at least one of the front end portion and the rear end portion of the vehicle and extending in the vehicle width direction and the vehicle vertical direction to separate the inside and outside of the vehicle
A side wall portion extending in the vehicle front-rear direction from the end of the front-rear wall portion in the vehicle width direction to separate the inside and outside of the vehicle
One end is connected to the inside of the front and rear wall in the vehicle front-rear direction, the other end is connected to the inside of the side wall in the vehicle width direction, and is convex in the vehicle width direction and inward in the vehicle front-rear direction in a plan view. With the connecting part of the closed cross-section structure curved so as
Vehicle skeleton structure with. The front and rear wall portions are provided with front and rear reinforcing portions having a closed cross-sectional structure extending in the vehicle width direction.
The side wall portion is provided with a side reinforcing portion having a closed cross-sectional structure extending in the front-rear direction of the vehicle.
The vehicle skeleton structure according to claim 1, wherein the connecting portion has one end connected to the front and rear reinforcing portions and the other end connected to the side reinforcing portion. The vehicle skeleton structure according to claim 1 or 2, wherein the connecting portion is arranged at the front portion of the vehicle and connects the front and rear wall portions and the side wall portion provided at the front end portion of the vehicle. The vehicle skeleton structure according to claim 3, wherein the connecting portions are provided in pairs on both sides in the vehicle width direction with the vehicle seat interposed therebetween. The vehicle skeleton structure according to any one of claims 1 to 4, wherein functional parts of the vehicle are housed in a region surrounded by the front and rear wall portions, the side wall portions, and the connecting portion.

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